Machinery for crushing and conveying ores



(No Model.) 3 Sheets-Sheet 1. J. 1119119999, v

MACHINERY FOR GRUSHING AND CONVEYING ORES.

.No. 249,995. Patented Nov. 22,1881.

@Zles: 721767 r.

(No Model.) 3 Sheets-Sheet 2.

J. RICHARDS.

v MACHINERY FOR GRUSHING AND CONVEYING 0113s.

No. 249,995. Patented Nov. 22,1881.

fn/emfor (No Model.) 3 SheetsSheet 3.

J. RICHARDS.

v MACHINERY FOR GRUSHING AND CONVEYING 0113s. No 249,995. w PatentedNov. 22,1881.

,rrsn States T FFICQ JOHN RICHARDS, OF SAN FRANCISCO, CALIFORNIA.

SPECIFICATION forming part of Letters Patent No. 249,995, dated November22, 1881.

Application filed September 20, 1580. (No model.)

cisco, in the countyot' San Francisco and State' of California, haveinvented certain new and useful Improvements in Machinery for Crushingand Conveying Ores; and I do hereby declare the following to be a full,clear, and exact description ofthe invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to the letters orfigures of reference marked thereon, which form a part of thisspecification.

This invention relates to machinery for pulverizing or crushing mineralores; and it consists in the construction and arrangement of parts, ashereinafter more fully described and claimed.

The object of my invention is to provide a convenient means for theemployment of aircurrents in removing the crushed material fromstamp-mills. This object is attained by the mechanism illustrated in theannexed drawings, in which- Figure 1 is a front view of myimprovedbattery, partly in section, in which the dust and crushed material areremoved through a central aperture or here extending through the diesand stamp-stem. Fig. 2 is a side view of the same. Figs. 3 and 4 arefront and side elevations of a rotary stamp-battery arranged with myimproved appliances for removing the dust. Fig.5is avertical sectionthrough the battery, and Fig. 6 a detail View of the driving-clamp shownin Figs. 3 and 4.

Like letters indicate corresponding parts in the several views.

A represents the stamp-frame; B,the battery, and C the battery-casing.bis the lower or fixed die, and c the upper die. (1 is the stamp-head,and a is a hollow stamp-stem attached thereto and communicating abovewith apipe, 0, through which the dust is drawn off by inducedair-currents, as will be hereinafter more fullydescribed. This pipe 0 isfixed and extends downward into the hollow stampstem, as shown by thedotted lines in Figs. 1 and 2, so that a continuous air-duct from theorifice at s is maintained. The stamp-stem a is raised by cams or otherdevices and slides freely in bearings WVhen the stamp is raised a strongair-current passes in at the feedway w and aperture s, as indicated bythe arrows, and carries upward with it as much fine dust as has beenmade by the blow. By drawing the air to the center and through a hollowdie and stamp-stein into a central connecting-pipe the dust is collectedas fast as made at the point where the ore is crushed, and byconcentration a small current may thus be made to perform the same workthat requires a large current when differently applied. The dust, afterbeing drawn up through the stamp-die and stem and off through the pipe0, can be conveyed to a suitable receiver or chamber, from which the airis exhausted by fans or other appropriate devices, such chamber beinglarge enough to neutralize the air-currents and permit precipitation ofall but fine floating dust. Each battery, when two or more are employed,can be connected with such a receiving-chamber by separatepipes, so thateach may operateindependently and the chamber, if required, may beconstructed with suitable divisions and airlocks.

In the battery shown in Figs. 3, 4, and 5 the stamp has a positiverotary motion, as well as a reciprocating one. The hollow stamp-stem cpasses through a framing, a, that supports the driving-gearing. Motionis imparted by a band to the pulley D, which is keyed fast to a sleeve,(1, through which the stamp-stem a slides freely. On the top of thispulley are two studs, f j, which engage the clamp 3 (shown in plan viewat Fig. 6.) This clamp or driver is fastened to the upper end of thestamp-stem a and slides up and down on the driving-studsf, so that thestem to willbe free to fall when raised and disengaged by the V0- lutecam g. The engagement of the studsff with the clamp-driver 3 causes thelatter to rotate the stamp-stem when the pulley D is revolved. When thestamp-stem a is revolved the cam 9 attached thereto comes in contactwith the roller h or a fixed tappet, if desired, thus raising thestamp-stem a and permitting it to fall once in each revolution,'oroftener, as the number of indeutures in the cam may determine. The finedust is drawn upward through the central bore, l, Fig. 5, into the pipe0, and thence to a box or conductor, M,

which is connected in turn with a fan, F, that forces the dust throughthe pipe 12 to a receiver or elsewhere, as may be required, forsubsequent processes. The roller-tappet h is made to adjust up and downin the framing a by means of its engagement with a rack on said frame,so that its position can be changed as the dies wear away at the bottom.The clamp or driver 3 may also be made adjustable for the same purpose.Access to the dies is had through a door, G, in the front of thebattery.

In Fig.5thebearing 'i is shown as filled with a packing, 1:, preferablycomposed of wood, which is so arranged as to lessen the efiects of jarand abrasion. The stamp is also cushioned on the upstroke by a collar,00, composed of elastic material.

A chamber is formed in the stamp-head at Ir, where the air-current willbe less strong, and thus permitcoarse particles of crushed material tofall back and be again submitted to the action of the dies. Thereciprocating motion of the stamp favors such return, because at eachstroke the air-current will be interrupted by the top die coming incontact with the lower one or with the ore between them.

Should the die or shoe become clogged with damp ore or from other cause,a stiif rod, .2, can be set in the lower die or in the bottom of thebattery, as shown in Fig. 5, so that the aperture or bore above will bekept clear.

By means of the fan F an induced air-current maybe maintainedthrough theconductor M, pipe 0, and the battery, which will concentrate the crushedmaterial at the lower aperture of the hollow stamp-stem and enable it tobe drawn through the same with the expenditure of but little power.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In an ore-stamp battery, the stamp stem, head, and dies, providedwith a central duct for removing the crushed material, in combinationwith mechanism for inducing air-currents through said duct,substantially as specifled.

2. In an ore-stamp battery, the combination, with a hollow cylindricalstamp stem and head, of a pipe having a telescopic connection with saidstem, stationary boxes or conveyers, and means for inducing anair-current for removing the crushed material vertically from the centerofthe battery, substantiallyas set forth.

3. In an ore-stamp battery, the combination, with a hollow stamp stem,head. and die, of a vertical clearingrod, substantially as and for thepurpose shown and described.

4. In an orestamp battery, the combination, with the hollow stamp-stema, head (I, and dies 1) 0, of the pipes e p, conveyer M, and fan F,whereby the crushed material is removed vertically from the center ofthe battery by in' duced air-currents, substantially as shown anddescribed.

In testimony whereot'I afiix my signature in presence of two witnesses.

JOHN RICHARDS.

\Vitnesses:

W. WINTERHALTER, G-no. II. MILLEN.

